Engineering Survey II (ENCE 203): Chapter 3 Orientation and Field Astronomy Notes 2025 | Study Material
ENGINEERING SURVEY II (ENCE 203) - Orientation and Field Astronomy
ENGINEERING SURVEY II (ENCE 203)
Chapter 3: Orientation and Field Astronomy | 5 Hours | 6 Marks

ENGINEERING SURVEY II (ENCE 203): Orientation and Field Astronomy

An Introduction to Orientation and Field Astronomy

This chapter of Engineering Survey II (ENCE 203) transitions into the principles of Orientation and Field Astronomy. These concepts are fundamental for establishing the absolute position and orientation of surveys.

Understanding orientation is key to solving resection problems, which allow surveyors to determine their own position by observing known points. Field astronomy provides the methods to determine azimuths and coordinates based on celestial bodies.

In this chapter, we will explore datum systems, analytical and field methods for resection (two-point and three-point), and the basics of field astronomy, including Nepal’s map projection system.

Chapter 3 Syllabus: Orientation and Field Astronomy

Chapter 3: Orientation and Field Astronomy
5 hours
6 Marks

3. Orientation and Field Astronomy (5 hours)

3.1 Introduction to datum system

3.2 Analytical intersection and resection

3.3 Two points and three-point resection and their significance

3.4 Instruction on field application

3.5 Introduction of astronomy, definition of terms

3.6 Geographical coordinate system

3.7 Map projection system of Nepal

3.8 Use of astronomy in surveying and mapping

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